Recent research has shown that millimetre wave (mmWave) communications can offer orders of magnitude increases in the cellular capacity. However, the physical layer secrecy performance of a mmWave cellular network has not been investigated so far. Leveraging the new path-loss and blockage models for mmWave channels, which are significantly different from conventional microwave channels, this chapter studies the network-wide physical layer security performance of the downlink transmission in a mmWave cellular network under a stochastic geometry framework. We first study the secure connectivity probability and the average number of perfect communication links per unit area in a mmWave network in the presence of non-colluding eavesdroppers. Then, the case of colluding eavesdroppers is studied. Numerical results demonstrate the network-wide secrecy performance, and provide interesting insights into how the secrecy performance is influenced by network parameters.
Physical layer security in mmWave cellular networks, Page 1 of 2
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